Thank you all for your thought it is really helping with troubleshooting.
Radiators are both xspc. Rear is slim and front is around 3cm thick crossflow,
https://www.amazon.co.uk/gp/aw/d/B06W9NXK3H?psc=1&ref=ppx_pop_mob_b_asin_title
Crossflow made more sense with the design at the time as standard rad would need some extra fittings to divert the flow back to the pump. Did some reading and there was literally no difference between the two hence the choice.
There are no other fittings for the fans I'm afraid, had to mount the pump in there and cabling round the back.
Fans pulling on the front rad were only option, otherwise I could not squeeze the fittings
at the bottom, since pump has to go first and rad to follow, rad need the fitting attached otherwise I would not be able to tighten the fittings.
Lol the way I squeezed it all feels like the only way you can get those parts in this case with this pump
I can go o or in detail if needed.
Fans are all noctua staric pressure optimised.
Any tips on how to drill a front grill in the aluminium case?
that us always 8 degrees less if I do that